Antonyms for the phrase 'were courteous' refer to the opposite behavior, which is rude or impolite. Instead of courteous, one could act discourteous, ungracious, impolite, uncivil, disrespectful, or inconsiderate. Being discourteous means showing a lack of politeness or restraint, behaving without regard for the feelings of others. Ungracious behavior is marked by a lack of gratitude, rudeness, or tactlessness. Impolite refers to behavior that is not respectful, civil, or considerate. Uncivil conduct implies a lack of civility or courtliness, and behaving disrespectfully or impolitely. Inconsiderate behavior indicates a lack of good judgement or sensitivity, resulting in being thoughtless or self-centered.